Why Does My Blower Motor Resistor Keeps Going Out?

Published date:

2022-10-15
Score: 4.26/5 (45 votes)

Are you searching for an answer to the question: Why does my blower motor resistor keeps going out? On this page, we've collected the most accurate and complete information to ensure that you have all of the answers you need. So keep reading!

In most cases, a blower motor resistor fails due to corrosion or overheating. Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor.

You may wonder, why is my blower resistor keep burning out? I finally found the simple solution and ultimately the actual cause to the issue of the blower resistor burning out and over-heating the plug wiring - The blower motor itself is the culprit! After years of replacing the blown resister module 3 to 4 a year, I finally bit the bullet and bought a new blower fan/motor.

Similarly one may ask, how long should a blower resistor last? How long should a blower motor resistor last? While a blower motor resistor is built to last for the car's lifespan, you can expect it to last for 10-15 years, but it's possible for them to last longer or shorter depending on the climate, driving habits, and quality of the resistor.

Besides above, will a blower motor work without the resistor? If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored.

Likewise, should you replace blower motor and resistor at the same time? We do suggest that you replace the resistor at the same time. It may not be critical, but this will keep the system more uniform. The issue may even be related to the resistor. If you know that it is not related to the issue, then you do not have to replace it.


How do I know if I need a blower motor or a resistor?

Signs of a Bad Blower Motor Resistor

Here are some common signs that your vehicle's blower motor resistor is bad: Loss of HVAC fan control (total or certain speeds) The fan only works on its highest speed setting. No air coming from vents.

Does a blower motor resistor have a fuse?

A fuse is often located on the resistor board. The fuse only protects the low and medium blower speeds. High speed will still work if the resistor fuse is blown.

Is there a fuse for blower motor?

Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.

How do I know if my blower motor relay is bad?

One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power may be cut off from the blower motor circuit causing the motor to no longer function.

What is the difference between blower motor and blower motor resistor?

The blower motor switch is the actual switch or button on the dash that you use to increase or decrease the fan speed. The blower motor IS the fan. The blower motor resistor is what allows the fan to work at different speeds as opposed to just off and on.

Does blower motor affect AC?

The blower motor is an important component of your air-conditioner. If it isn't working properly, it can significantly affect the comfort level and air quality in your home.

How do you know if your blower motor is bad?

Weak or Absent Airflow

Weak airflow or total lack of it is the most obvious sign of a bad blower motor. The problem could be due to a clogged blower from accumulated dust or debris. It could also be due to leaky air ducts or a bad capacitor.


Why Does My Blower Motor Resistor Keeps Going Out - What other sources say:

Why does my blower resistor keep going bad - iFixit?

Trent, one of the biggest reasons for blower motor resistors to have shorten life is actually because of faulty blower motor drawing too many ...

Blower motor resistor keeps failing?

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Why Does My Blower Motor Resistor Keeps Going Bad?

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My blower resistor switch keeps burning out on the - Fixya?

Burnt or bad connections can cause this as well. You can test the blower motor by connecting direct power from a source like the cigarette lighter if you are ...

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If the blower motor resistors' internal components fail it may cause the blower motor to malfunction, or not function at all on one or more of ...

Blower motor resistor keeps going out? - Maintenance/Repairs?

If a motor (for some reason) is restricted in speed, it will be drawing a higher current than designed for at that fan speed setting. So, if the ...

Repeated fan blower resistor failure - Car Talk Community?

You need to replace the blower motor. It is apparently drawing too many amps & continually burning up the resistor.


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